A composable concurrency paradigm requires a general-purpose cancellation mechanism.

Drawn from what Nelson Elhage said

What this subject means

design How things should be made and judged: what makes a design good, who should do the designing, and what an interface is for.

What Nelson Elhage actually said

Do you hold this korrent?Do you also believe this?

Shared subject first, then similar wording. They may agree or disagree.